The starting point of course has to be to understand the work load, which is a combination of scheduled and unscheduled.
The scheduled workload is a combination of work derived from the Aircraft Maintenance Program AMP and additional works, whether company generated or regulatory driven.
The MPD is a dynamic document and subject for a continuous revision to include all changes as a result of STC., CUSTOMER REQUIREMENT, SBs, ADs, etc.
The standard cost is usually indicated under OEM MPD corresponding to each task under the ”A”, ”B”, ”C” -Checks etc.
Therefore we have a situation which acts as the base line to understand our Manpower requirements and allows us, whether Airline, Operator or MRO to plan for Maintenance Manpower together with associated parts requirement and as a consequence to understand the Ground time required for the relevant work scope of an aircraft for the Packaged due tasks (either for phased and/or blocked type of check depending on Operators Customized MPD.
Depending on the efficiency of each crew this costs may be UP OR DOWN from OEM MPD recommendation.
OEMs will estimate the number of man hours required to perform various maintenance tasks on their products. They do “time and motion” studies to determine these values for the “average” person (mechanic) with the correct tools and workshop support.
Operators usually set a factor based on their crew efficiency either 1.25 times or 1.5 times or 2 times from the recommended OEM MPD recommendation. Therefore regarding the average of maintenance cost the Operator has to watch the trend and set the average costs for planning purpose based on the Model of each aircraft and/or fleet.
OEMs will estimate the number of man hours required to perform various maintenance tasks on their products. They do “time and motion” studies to determine these values for the “average” person (mechanic) with the correct tools and workshop support.
In each case of an MRO or facility with many and varied issues for example manpower constraints and material or logistic issues, these OEM estimates may be over optimistic.
Eventually by understanding the actual events post maintenance and making detailed analysis, specific data may be established.
Tags:
AD's, Aircraft, Aircraft Maintenance, Aircraft Maintenance Program, AMP, CUSTOMER REQUIREMENT, Maintenance, MPD, OEM, Planning, SBs, STC
